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Sinister Diesel - Mufflers for Duramax
Improve the Look
Sinister Diesel has mufflers for your Duramax. Whether you're looking for 4" or 5" diameter, you can find something that will fit what you are looking for
Why Buy Your Muffler from Sinister?
We have a wide selection of mufflers to choose from, and each is backed by free, live technical support and our Sinister guarantee. So pick your exhaust pieces and start enjoying everything that comes with a performance exhaust kit!